Thermostatic valve.



I N 806,465, ,PATENTED DEC. 5; 1905.

'1. IL GRANMER. THERMOSTATIO VALVE.

APPLICATION FILED MAY 1. 1905.

'ingo vie , two sections of the automatic disk are com-.

UNITED STATES PATENT. OFFICE.

JOHN I. CRANMER, OF CHICAGO, ILLINOIS, ASSIGITOR OF ONE-HALF TO Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed May 1 1905. Serial No. 258,413.

, To all whom it may concern.

Be it known that I, JOHN I. CRANMER, a citizen of the United States of Alnerica, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Thermostatic Valves, of which the following is a specification.

and explained in this specification and shown in the accompanying drawings, in which Figure 1 is a central longitudinal section through my improved device. Fi 2 is a .perspective view of the automatic isk, and

Fig. 3 is a perspective view of the coupling which connects the two sections of the automatic disk. 7

Referring to the drawings, A is a valvebody, here shown as of the angle type, havenings a a, the openin a being prowith a valve-seat 00 t will be obvious in the further description of my device that the valve-body could be modified to a very great extent, if desired, the special features of my device residin not in the body, but in the valve proper. per end of the body is a sleeve B, which carries at its upper end an ordinary valve-bonnet C, in which is threaded a valve-stem D, packed in any ordinary way. I adopt the construction herein illustrated for my valve, because the valve body and bonnet, substantially as here shown, can be purchased upon the open market at a very low price, and by the use of the sleeve B the structure becomes erfectly adapted for use in my device. A rther advantage of this construction lies in the fact that there aremanyvalves nowin use which can be made automatic by adding the proper arts, inwhich case the body proper would e enlarged in size by the interposition of a sleeve. It will be obvious that in manufacturing the device on a lar e scale, however, the body andsLeeve won (1 naturally be made in one piece. The lower end of a valve-stem D is provided with a head (1, which enters a laterally-open recessin the upper head 6 of the upper section E of the automatic disk, the lower section of which is designated by E in the drawings. These osed of lengths of metal tubing, preferably rass, the adjacent ends of said tubes or sececured to the upopening ,a.

tions being made in the form of flexible diaphra ms e e joined together by a central coup ing E fextending through the same and clamped in place bynuts 6 By this means the two sections of the automatic disk are made to communicate with each other, but are not in communication with the outside air. The lower end of the lower section E of the automatic disk is made in the form of a plate E which seats on the valve-seat a under proper conditions. A rod F extends from the plate a down through the coupling E and carries at its lower end a plate j,which forms the lower abutment for a spring F, the upper end of which bears against the diaphragm e Within the lower section of the casing is a body of liquid G, which has a boiling-point lower than 212 Fahrenheit as, for instance, alcohol or-a light hydrocarbon. The head 6 is of slightly larger diameter than the. remainder of the automatic disk, thereby forming a flange which is adapted to rest upon an annular shoulder 1), formed upon the sleeve B. The disk is brought to its working position by screwing the valve-stem down until the head 6 of the disk rests-upon the shoulder 17.

My improved device is particularly desirable in heating systems, and especially in car-heating systems, and its operation is substantially as follows: In starting the sys tem steam is admitted to'the heating system and passes through the same to the valve, which is located in the discharge-pi e thereof, permitting the steam to flow om the Thereupon as the temperature the liquid in the automatic disk rises the internal pressure increases, forcing outward each of the two flexible diaphragms and eventually causing the disk to seat in the valve-seat a The valve then remains closed until the temperature ofthe water of condensation, which accumulates in the discharge-pipe, lowers sufficiently to cause the vapor in the disk to condense, whereupon the s ring. raises the bottom of the automatic isk, opening the valve, discharging the water which has accumulated until steamis again discharged, whereupon the operation above described is repeated. The auto matic disks can be raised at any time to blow off the system or any water of condensation which may have collected.

My device is particularly. advantageous,

- therethrough, of a screw-threaded valvestem and a disk supported on the end of the valve-stem and movable therewith, said disk being adapted to expand automatically when heated and seat itself.

2. In a device of the class described, the combination with a valve-body having a seat and a screw-threaded valve-stem, of an expanding hollow body secured to said valvestem and movable therewith and arranged to engage with said seat, said body containing a quantity of fluid which vaporizes at a temperature less than that of steam.

3. In a device of the class described, the combination with a valve body having a seat, of an automatic disk within the same and having one end adapted to engage with said seat to close the valve, said automatic disk being composed of two communicating portions, the adjacent heads of which are made in the form of flexible diaphragms.

4. In a device of the class described, the combination with a valve body and seat, of an upper disk ortion having a lower flexible diaphragm, a ower disk portion having an upper flexible diaphragm, a hollow coupling connecting said flexible diaphragm, the

lower end of said lower disk portion being arranged to engage said seat, and a body of fluid within said disk portions adapted to vaporize at a lower temperature than that of steam.

5. In a device of the class described, the combination with a valve body and seat, of an upper disk )ortion having a lower flexible diaphragm, a ower disk portion having an upper flexible diaphragm, a hollow coupling connecting said flexible diaphragm, the lower end of said lower disk portion being arranged to engage said seat, a body of 'lluid within said disk portions adapted to vaporize at a lower temperature than that of steam, a rod secured to the top of said upper disk portion and extending through said coupling and a spring supported by the lower end of said rod and bearing on the top of said lower disk portion.

6. In a device of the class described, the combination with a valve-body havin inlet and outlet openings, of a valve-seat ad acent to the outlet-opening, an expansible body supported between the inlet and outlet opening and arranged to seat itself upon said valveseat to close the outlet-opening when heated.

7. The combination with a valve body having a passage and a valve-seat, of a screw threaded valve stem and a thermostatic valve carried by and movable with said valve-stem and arranged to seat itself when heated upon said valve-seat.

In witness whereof I have signed the above application for Letters Patent, at Chicago, in the county of Cook and State of Illinois, this 21st day of April, A. D. 1905.

JOHN I. CRANMER.

Witnesses:

CHAs. O. SHERVEY, K. M. CORNWALL. 

